NAME

     dctvf  - module to do dafd frequency equalization (Cray 2)

SYNOPSIS

     dctvf [ -Nntap ] [ -Ootap ] [ -dbdb ] [ -ffile ] [ -aamp ] [
     -wlw ] [ -V ] [ -? ]

DESCRIPTION

     dctvf Perform spectral balancing using a number of frequency
     bands  with over lapping ramps.  As each filter finishes its
     output that output is scaled with a running agc  window  and
     the  results  of  all these operations are added together to
     for a composite trace.

     dctvf gets processing controls from the command  line.  Rea-
     sonable defaults are set up.


  Command line arguments
     -N ntap
          Enter the full path of the file containing the data set
          or nothing for stdin pipe.


     -O otap
          Enter the output file name for the filtered  traces  or
          nothing for stdout pipe.

     -db db
          Rolloff in decibels from the inside 2  corner  frequen-
          cies (def=40 db).

     -r band
          Interval in Hz within which rolloff occurs (def=10 Hz).

     -a amp
          Amplitude to which agc will scale individual

     -w lw
          Length of agc window in ms (def=500).

     -f file
          Name of file containing  trapezoidal  frequencies,  one
          filter  per  line  (up to 100 filters).  Each line con-
          tains  f1  f2  f3  f4     (in Hz).  useful if the  sam-
          pling interval is in different units than expected.

     -?   Query mode.  With this flag, dctvf will give a descrip-
          tion of the command line arguments and stop the program
          (use '-?' if you are in c-shell).

DISCUSSION

     This program will run on the sun workstations.

BUGS

     unknown

AUTHORS

     Ken Peacock (and Paul Gutowski - Cray 2 version)

COPYRIGHT

     copyright 2001, Amoco Production Company
               All Rights Reserved
          an affiliate of BP America Inc.